URINALYSIS. 145 



ounce of glycerine. Thoroughly mix. To this mix- 

 ture add 5 ounces of liquor potassse. Make i liter of 

 this. 



ALBUMIN. 



Albumin is one of the abnormal constituents of the 

 urine. The presence of the same is indicative of 

 some lesion in the kidneys, especially in the uriniferous 

 tubules, according to Bowman's theory. This may be 

 a nephritis. The method of finding the presence of 

 the same is simple. It depends upon the fact that 

 albumin is coagulated under certain conditions. These 

 we must now study. Heat the urine at the top for a 

 short while and, if albumin is present, there will be a 

 white ring at the junction of the cold and hot urine, 

 which is the test for albumin. 



Make an acid test for albumin. Take a small quan- 

 tity of nitric acid, and place it in a test-tube and al- 

 low a small amount of urine to flow down the side of 

 the tube. If albumin is present, there will be a 

 white ring or zone at the point of contact. This is 

 said to detect i part in 100,000 parts of urine. But 

 this is not as delicate as the heat test. 



GRAVIMETRIC METHODS. 



Gravimetric methods are of extreme importance to 

 the physician in cases of Bright' s Disease. But the 

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